Long, long, ago I covered several Billy Graham crusades or other evangelistic efforts linked to his organization. In the days before these giant events, the pros doing press relations went out of their way to explain many of the fine details of what was happening and why.
For example, they noted that after Graham extended his invitation for people to come forward to accept Jesus Christ as their personal savior, or to rededicate their lives as Christians, many of the first people who came forward were actually trained counselors who would be greeting these seekers and helping to answer their questions. The counselors sat all over the stadium rather than clogging up the front rows in front of the podium.
Did this give the appearance that many people were streaming forward to make decisions, thus helping “break the ice” for those who might hesitate? That way have been a secondary affect. The key was that the counselors immediately went to work at the front of the stadium doing what they were supposed to do — work with the seekers who were coming forward. (For example, during the Colorado crusade in 1987, one of my stories focused on the cooperation between the Denver Catholic Archdiocese and the Billy Graham Evangelistic Association to find and train Catholic counselors to work with Catholics who came forward to make decisions.)
In other words, it was a valid question to ask about the visual effect of the counselors streaming forward. The Graham people heard the question, validated it and then provided an answer.